150 (#206) ############################################ WOOLLEN AND WORSTED SPINNING by this means find the difficulties. What will be the weight produced of 80 skeins ? Careful consideration will reveal three disturbing influences, all of which must be taken into account :- I. As 80 skeins is only fő the weight of I skein length for length, then, even if the length production of the frame be maintained, the weight production will fall in the proportion 1 of : As 80: 1 2. But the length production cannot be maintained as the twist for 80 skeins is 18 (259) as against 2 (25°) for i skein. Therefore, the delivery I . will be reduced (as spindle speed cannot be increased) in this proportion and, as a result, the weight production will again fall in the proportion of: As 18:2 On similar lines to the example given for I skein the lb. per hour for 5, 10, 20 and 80 skeins, also taking into account the relative twist, are plotted in Fig. 48 (a). 3. The third factor is still more difficult to tackle- the doffing time allowance varies in proportion to the skeins spun. Thus if each bobbin holds $ of 1 lb., then I doffing of i skein will take 256 X 1 X •125 X 36 X 2 •77 of a minute 3000 to spin. Now if 15 minutes be taken as doffing time the basis of calculation stands :- Time for spinning i skein •77 min. (T) Time for doffing I skein 15.00 min. (DT) 15•77 mins. Time for spinning I set of 1 skein Thus the theoretical calculated production of the frame will have to be considerably reduced, as follows :: 150